What is CVE-2026-4406?

CVE-2026-4406 is a medium-severity vulnerability in Gravity Forms, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-04-07.

How severe is CVE-2026-4406?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Is CVE-2026-4406 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Gravity Forms

CVE-2026-4406

The Gravity Forms plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `form_ids` parameter in the `gform_get_config` AJAX action in all versions up to, and including, 2.9.30. This is due to the `GFCommon::send_json…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (13.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Gravity Forms — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

Hann1bl3L3ct3r/CVE-2026-4406

References

Frequently asked questions

What is CVE-2026-4406?: CVE-2026-4406 is a medium-severity vulnerability in Gravity Forms, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-04-07.
How severe is CVE-2026-4406?: Medium severity. CVSS v3 base score is 4.7 out of 10.
Is CVE-2026-4406 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.